Claims
- 1. Heat-resisting high-strength Al-alloy consisting essentially of Mn and/or Zn besides Si, Fe, Cu, Mg and Li in the following range of chemical composition, the remainder consisting of an inevitable impurity and Al:
- 8.0.ltoreq.Si.ltoreq.30.0 wt%,
- 20.ltoreq.Fe.ltoreq.33.0 wt%,
- 0.8.ltoreq.Cu.ltoreq.7.5 wt%,
- 0.3.ltoreq.Mg.ltoreq.3.5 wt%,
- 1.0.ltoreq.Li.ltoreq.5.0 wt%, and
- 0.5.ltoreq.Mn.ltoreq.5.0 wt%, and/or
- 0.5.ltoreq.Zn.ltoreq.10.0 wt%.
- 2. A method for manufacturing a structural member made of a heat-resisting, high-strength sintered Al-alloy, comprising the steps of:
- providing a molten Al-alloy consisting essentially of:
- 8.0.ltoreq.Si.ltoreq.30 wt.%,
- 2.0.ltoreq.Fe.ltoreq.33.0 wt.%,
- 0.8.ltoreq.Cu.ltoreq.7.5 wt.%,
- 0.3.ltoreq.Mg.ltoreq.3.5 wt.%,
- 1.0.ltoreq.Li.ltoreq.5.0 wt.%, and
- 0.5.ltoreq.Mn.ltoreq.5.0 wt.%, and/or
- 0.5.ltoreq.Zn.ltoreq.10.0 wt.%,
- the remaining being Al and inevitable impurities;
- quenching and solidifying said molten Al-alloy at a cooling speed of 10.sup.3 .degree.C./sec or higher to obtain an Al-alloy powder;
- press-shaping said Al-alloy powder at a temperture of 350.degree. C. or lower and at a shaping pressure of 1.5 to 5.0 ton/cm.sup.2 to obtain a raw material for extrusion having a density ratio of 70% or higher;
- extruding said raw material for extrusion at a temperature of 300.degree. to 400.degree. C. and at an extrusion ratio of 5 or higher to obtain a raw material for forging;
- charging said raw material for forging into a metal mold that has been pre-heated to a temperature of 150.degree. C. to 450.degree. C.;
- forge-shaping said raw material for forging in said metal mold at a temperature of 300.degree. to 495.degree. C. to obtain a forge-shaped body; and cooling the forge-shaped body.
- 3. A method for manufacturing a structural member made of heat-resisting high-strength sintered Al-alloy according to claim 2, wherein intermetallic compounds formed in said powder have a size of 10 microns or less.
- 4. A method for manufacturing a structural member made of heat-resisting high-strength sintered Al-alloy according to claim 2, wherein said structural member is a connecting rod.
- 5. A method for manufacturing a structural member made of heat-resisting high-strength sintered Al-alloy according to claim 2, wherein said structural member is a piston rod.
Priority Claims (2)
Number |
Date |
Country |
Kind |
59-249472 |
Nov 1984 |
JPX |
|
60-81938 |
Apr 1985 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 801,719, filed Nov. 26, 1985, abandoned.
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Name |
Date |
Kind |
2357449 |
Bonsack |
Sep 1944 |
|
3325279 |
Lawrence et al. |
Jun 1967 |
|
4435213 |
Hildeman et al. |
Mar 1984 |
|
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0112787 |
Jul 1984 |
EPX |
0144898 |
Jun 1985 |
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GBX |
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Divisions (1)
|
Number |
Date |
Country |
Parent |
801719 |
Nov 1985 |
|